What happens if my sons ex wife refuses to engage with any reasonable negotiations regarding financial order. He has spoken to a mediator, at her request, and it ended with his ex swearing at the mediator and slamming the phone down. The marital property is in his sole name and he has always paid the mortgage and all the bills. The child from the marriage lives with him and only very limited contact with her mother.He is willing to split the equity 50/50. Can he sell the house and keep half the remaining equity on one side to give to his ex. He is quite possibly entitled to more because he is responsible for his child. His ex wife earns about 2/3rds of what my sons earns.